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Assessment Data for the State of Louisiana Year 2004
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State of Louisiana websites: | No State 305(b) Water Quality Assessment Report is available. |
| State Water Quality Program |
Search for a Waterbody within Louisiana
Total Assessed Waters for the State of Louisiana
Description of this table| Size Of Water | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Rivers, Streams, Creeks (Miles) | Lakes, Ponds, Reservoir (Acres) | Bays, Estuaries (Square Miles) | Coastal Shorelines (Miles) | Oceans, Near Coastal Waters (Square Miles) | Wetlands (Acres) | Great Lakes Shoreline (Miles) | Great Lakes Open Water (Square Miles) | Inland Lake Shoreline (Miles) | |
| Total Assessed Waters | 8,528.80 | 586,434.00 | 4,866.50 | .00 | .00 | 750,080.00 | .00 | .00 | .00 |
| Estimated Total Water Size in LA | 66,294.00 | 1,078,031.00 | 7,656.00 | Unavailable | Unavailable | 7,784,200.00 | Unavailable | Unavailable | Unavailable |
| Percent of Waters Assessed | 12.87 | 54.40 | 63.56 | Unavailable | Unavailable | 9.64 | Unavailable | Unavailable | Unavailable |
Assessed Waters of Louisiana by Watershed (8 Digit USGS Cataloging Unit)
Description of this table| Watershed | Size of Water | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Rivers, Streams, Creeks (Miles) | Lakes, Ponds, Reservoir (Acres) | Bays, Estuaries (Square Miles) | Coastal Shorelines (Miles) | Oceans, Near Coastal Waters (Square Miles) | Wetlands (Acres) | Great Lakes Shoreline (Miles) | Great Lakes Open Water (Square Miles) | Inland Lake Shoreline (Miles) | |
| 8-digit HUC Name Not Reported | 130.30 | 3,220.00 | 235.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| AMITE | 308.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ATCHAFALAYA | 88.00 | .00 | 391.00 | .00 | .00 | 663,040.00 | .00 | .00 | .00 |
| BAYOU BARTHOLOMEW | 69.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BAYOU D'ARBONNE | 195.00 | 23,571.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BAYOU MACON | 278.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BAYOU PIERRE | 81.00 | 12,192.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BAYOU SARA-THOMPSON | 78.00 | 84.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BAYOU TECHE | 526.00 | 26,807.00 | 190.00 | .00 | .00 | 201,600.00 | .00 | .00 | .00 |
| BLACK | 58.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BLACK LAKE BAYOU | 83.00 | 14,835.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BODCAU BAYOU | 32.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BOEUF | 475.00 | 3,719.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BOGUE CHITTO | 143.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CASTOR | 82.50 | 5,173.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CROSS BAYOU | 23.00 | 3,968.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| DUGDEMONA | 81.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| EAST CENTRAL LOUISIANA COASTAL | 315.00 | 74,900.00 | 427.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| EASTERN LOUISIANA COASTAL | 269.00 | .00 | 1,444.00 | .00 | .00 | 7,680.00 | .00 | .00 | .00 |
| LAKE MAUREPAS | 78.00 | .00 | 91.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LAKE PONTCHARTRAIN | .00 | .00 | 621.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LIBERTY BAYOU-TCHEFUNCTA | 184.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LITTLE | 180.00 | 26,880.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOGGY BAYOU | 109.00 | 17,216.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER CALCASIEU | 128.00 | .00 | 347.50 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER GRAND | 256.00 | 2,912.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER MISSISSIPPI-BATON ROUGE | 357.00 | 4,184.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER MISSISSIPPI-GREENVILLE | 315.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER MISSISSIPPI-NATCHEZ | 315.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER MISSISSIPPI-NEW ORLEANS | 404.00 | .00 | 200.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER OUACHITA | 218.00 | 4,134.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER OUACHITA-BAYOU DE LOUTRE | 145.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER PEARL | 314.00 | .00 | 3.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER RED | 336.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER RED-LAKE IATT | 266.00 | 2,176.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER SABINE | 150.00 | 4,224.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MCKINNEY-POSTEN BAYOUS | 218.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MERMENTAU | 235.00 | 135,680.00 | 315.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MERMENTAU HEADWATERS | 251.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MIDDLE RED-COUSHATTA | 218.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| RED CHUTE | 78.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SALINE BAYOU | 54.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TANGIPAHOA | 120.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TENSAS | 170.00 | 4,768.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TICKFAW | 185.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TOLEDO BEND RESERVOIR | .00 | 181,760.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER CALCASIEU | 290.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| VERMILION | 186.00 | 2,170.00 | 413.00 | .00 | .00 | 74,880.00 | .00 | .00 | .00 |
| WEST CENTRAL LOUISIANA COASTAL | 540.00 | 30,138.00 | 982.00 | .00 | .00 | 4,480.00 | .00 | .00 | .00 |
| WEST FORK CALCASIEU | 220.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| WHISKY CHITTO | 258.00 | 1,747.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
Louisiana Assessed Waters
Individual Use Support for Rivers and Streams
Description of this table
| State Designated Use | Total Miles Assessed | Percent Good | Percent Threatened | Percent Impaired |  % Good |
|---|---|---|---|---|---|
 % Threatened |
|||||
 % Impaired |
|||||
| AGRICULTURE | 1,529.00 | 100.00 | .00 | .00 | |
| DRINKING WATER SUPPLY | 1,182.00 | 100.00 | .00 | .00 | |
| FISH AND WILDLIFE PROPAGATION | 8,377.50 | 27.73 | .43 | 71.84 | |
| LIMITED AQUATIC LIFE AND WILDLIFE USE | 13.00 | 100.00 | .00 | .00 | |
| OUTSTANDING NATURAL RESOURCE WATERS | 1,468.00 | 61.99 | .00 | 38.01 | |
| OYSTER PROPAGATION | 409.00 | 64.06 | .00 | 35.94 | |
| PRIMARY CONTACT RECREATION | 8,339.80 | 59.01 | .00 | 40.99 | |
| SECONDARY CONTACT RECREATION | 8,286.50 | 91.07 | .62 | 8.31 | |
Louisiana Assessed Waters
Water Quality Attainment for Rivers and Streams
Description of this table
| Attainment Status | Miles | Percent of Assessed |
| Good | 1,326.00 | 15.55 |
| Threatened | 36.00 | .42 |
| Impaired | 7,166.80 | 84.03 |
| Total Miles Assessed | 8,528.80 | 100.00 |
Louisiana Top Causes of Impairments
for Rivers and Streams
Description of this table
| # | State Cause Name | Total Miles Impaired |
|---|---|---|
| 1 | OXYGEN, DISSOLVED | 3,918.50 |
| 2 | FECAL COLIFORM | 3,666.00 |
| 3 | TOTAL SUSPENDED SOLIDS (TSS) | 2,506.00 |
| 4 | NITRATE/NITRITE (NITRITE + NITRATE AS N) | 2,396.00 |
| 5 | TURBIDITY | 2,314.00 |
| 6 | PHOSPHORUS (TOTAL) | 2,039.00 |
| 7 | SEDIMENTATION/SILTATION | 1,696.00 |
| 8 | MERCURY | 1,548.00 |
| 9 | TOTAL DISSOLVED SOLIDS | 1,273.50 |
| 10 | SULFATES | 1,152.00 |
Louisiana Top Probable Sources of Impairments
for Rivers and Streams
Description of this table
| # | State Source Name | Total Miles Impaired by Source |
|---|---|---|
| 1 | SOURCE UNKNOWN | 4,674.50 |
| 2 | IRRIGATED CROP PRODUCTION | 2,097.00 |
| 3 | NATURAL CONDITIONS - WATER QUALITY STANDARDS USE ATTAINABILITY ANALYSES NEEDED | 1,711.00 |
| 4 | ON-SITE TREATMENT SYSTEMS (SEPTIC SYSTEMS AND SIMILAR DECENCENTRALIZED SYSTEMS) | 1,680.00 |
| 5 | NON-IRRIGATED CROP PRODUCTION | 1,666.00 |
| 6 | ATMOSPHERIC DEPOSITON - TOXICS | 1,324.00 |
| 7 | MUNICIPAL POINT SOURCE DISCHARGES | 993.00 |
| 8 | WILDLIFE OTHER THAN WATERFOWL | 583.00 |
| 9 | DROUGHT-RELATED IMPACTS | 541.00 |
| 10 | SOURCES OUTSIDE STATE JURISTICTION OR BORDERS | 487.00 |
Louisiana Assessed Waters
Individual Use Support for Lakes, Ponds and Reservoirs
Description of this table
| State Designated Use | Total Acres Assessed | Percent Good | Percent Threatened | Percent Impaired | % Good |
|---|---|---|---|---|---|
| % Threatened |
|||||
| % Impaired |
|||||
| AGRICULTURE | 346,848.00 | 100.00 | .00 | .00 | |
| DRINKING WATER SUPPLY | 205,373.00 | 100.00 | .00 | .00 | |
| FISH AND WILDLIFE PROPAGATION | 586,434.00 | 5.26 | .33 | 94.41 | |
| PRIMARY CONTACT RECREATION | 558,011.00 | 92.90 | .00 | 7.10 | |
| SECONDARY CONTACT RECREATION | 558,011.00 | 93.51 | .00 | 6.49 | |
Louisiana Assessed Waters
Water Quality Attainment for Lakes, Ponds and Reservoirs
Description of this table
| Attainment Status | Acres | Percent of Assessed |
| Good | 30,851.00 | 5.26 |
| Threatened | 1,926.00 | .33 |
| Impaired | 553,657.00 | 94.41 |
| Total Acres Assessed | 586,434.00 | 100.00 |
Louisiana Top Causes of Impairments
for Lakes, Ponds and Reservoirs
Description of this table
| # | State Cause Name | Total Acres Impaired |
|---|---|---|
| 1 | NON-NATIVE AQUATIC PLANTS | 312,059.00 |
| 2 | MERCURY | 241,230.00 |
| 3 | TURBIDITY | 186,380.00 |
| 4 | OXYGEN, DISSOLVED | 164,397.00 |
| 5 | SEDIMENTATION/SILTATION | 164,346.00 |
| 6 | TOTAL SUSPENDED SOLIDS (TSS) | 156,343.00 |
| 7 | TOTAL DISSOLVED SOLIDS | 138,004.00 |
| 8 | CHLORIDE | 132,839.00 |
| 9 | NITRATE/NITRITE (NITRITE + NITRATE AS N) | 126,032.00 |
| 10 | PHOSPHORUS (TOTAL) | 126,032.00 |
Louisiana Top Probable Sources of Impairments
for Lakes, Ponds and Reservoirs
Description of this table
| # | State Source Name | Total Acres Impaired by Source |
|---|---|---|
| 1 | SOURCE UNKNOWN | 386,109.00 |
| 2 | ATMOSPHERIC DEPOSITON - TOXICS | 235,688.00 |
| 3 | NATURAL CONDITIONS - WATER QUALITY STANDARDS USE ATTAINABILITY ANALYSES NEEDED | 144,242.00 |
| 4 | NON-IRRIGATED CROP PRODUCTION | 101,460.00 |
| 5 | IRRIGATED CROP PRODUCTION | 84,048.00 |
| 6 | DROUGHT-RELATED IMPACTS | 74,900.00 |
| 7 | IMPACTS FROM HYDROSTRUCTURE FLOW REGULATION/MODIFICATION | 27,981.00 |
| 8 | WATERFOWL | 27,840.00 |
| 9 | MANAGED PASTURE GRAZING | 26,880.00 |
| 10 | PETROLEUM/NATURAL GAS PRODUCTION ACTIVITIES (PERMITTED) | 26,880.00 |
Louisiana Assessed Waters
Individual Use Support for Bays and Estuaries
Description of this table
| State Designated Use | Total Square Miles Assessed | Percent Good | Percent Threatened | Percent Impaired | % Good |
|---|---|---|---|---|---|
| % Threatened |
|||||
| % Impaired |
|||||
| FISH AND WILDLIFE PROPAGATION | 4,866.50 | 59.43 | .00 | 40.57 | |
| OYSTER PROPAGATION | 3,746.00 | 97.78 | .00 | 2.22 | |
| PRIMARY CONTACT RECREATION | 4,340.50 | 87.12 | .00 | 12.88 | |
| SECONDARY CONTACT RECREATION | 4,431.50 | 100.00 | .00 | .00 | |
Louisiana Assessed Waters
Water Quality Attainment for Bays and Estuaries
Description of this table
| Attainment Status | Square Miles | Percent of Assessed |
| Good | 2,277.00 | 46.79 |
| Threatened | .00 | .00 |
| Impaired | 2,589.50 | 53.21 |
| Total Square Miles Assessed | 4,866.50 | 100.00 |
Louisiana Top Causes of Impairments
for Bays and Estuaries
Description of this table
| # | State Cause Name | Total Square Miles Impaired |
|---|---|---|
| 1 | MERCURY | 1,657.00 |
| 2 | FECAL COLIFORM | 1,522.00 |
| 3 | TURBIDITY | 624.00 |
| 4 | OXYGEN, DISSOLVED | 299.00 |
| 5 | NITRATE/NITRITE (NITRITE + NITRATE AS N) | 297.00 |
| 6 | PHOSPHORUS (TOTAL) | 297.00 |
| 7 | TOTAL SUSPENDED SOLIDS (TSS) | 193.00 |
| 8 | SEDIMENTATION/SILTATION | 193.00 |
| 9 | CARBOFURAN | 187.00 |
| 10 | NON-NATIVE AQUATIC PLANTS | 91.00 |
Louisiana Top Probable Sources of Impairments
for Bays and Estuaries
Description of this table
| # | State Source Name | Total Square Miles Impaired by Source |
|---|---|---|
| 1 | SOURCE UNKNOWN | 2,224.00 |
| 2 | ATMOSPHERIC DEPOSITON - TOXICS | 1,657.00 |
| 3 | SANITARY SEWER OVERFLOWS (COLLECTION SYSTEM FAILURES) | 561.00 |
| 4 | NON-IRRIGATED CROP PRODUCTION | 193.00 |
| 5 | IRRIGATED CROP PRODUCTION | 193.00 |
| 6 | WILDLIFE OTHER THAN WATERFOWL | 56.00 |
| 7 | MARINA/BOATING SANITARY ON-VESSEL DISCHARGES | 55.00 |
| 8 | UPSTREAM SOURCE | 44.00 |
| 9 | NATURAL CONDITIONS - WATER QUALITY STANDARDS USE ATTAINABILITY ANALYSES NEEDED | 22.00 |
| 10 | NATURAL SOURCES | 20.00 |
Louisiana Assessed Waters
Individual Use Support for Wetlands
Description of this table
| State Designated Use | Total Acres Assessed | Percent Good | Percent Threatened | Percent Impaired | % Good |
|---|---|---|---|---|---|
| % Threatened |
|||||
| % Impaired |
|||||
| DRINKING WATER SUPPLY | 464,000.00 | 100.00 | .00 | .00 | |
| FISH AND WILDLIFE PROPAGATION | 750,080.00 | 72.10 | .00 | 27.90 | |
| PRIMARY CONTACT RECREATION | 544,000.00 | 100.00 | .00 | .00 | |
| SECONDARY CONTACT RECREATION | 551,040.00 | 100.00 | .00 | .00 | |
Louisiana Assessed Waters
Water Quality Attainment for Wetlands
Description of this table
| Attainment Status | Acres | Percent of Assessed |
| Good | 540,800.00 | 72.10 |
| Threatened | .00 | .00 |
| Impaired | 209,280.00 | 27.90 |
| Total Acres Assessed | 750,080.00 | 100.00 |
Louisiana Top Causes of Impairments
for Wetlands
Description of this table
| # | State Cause Name | Total Acres Impaired |
|---|---|---|
| 1 | TURBIDITY | 199,040.00 |
| 2 | SEDIMENTATION/SILTATION | 199,040.00 |
| 3 | MERCURY | 199,040.00 |
| 4 | OXYGEN, DISSOLVED | 199,040.00 |
| 5 | SULFATES | 7,680.00 |
| 6 | CHLORIDE | 7,680.00 |
| 7 | TOTAL DISSOLVED SOLIDS | 7,680.00 |
Louisiana Top Probable Sources of Impairments
for Wetlands
Description of this table
| # | State Source Name | Total Acres Impaired by Source |
|---|---|---|
| 1 | ATMOSPHERIC DEPOSITON - TOXICS | 199,040.00 |
| 2 | SOURCE UNKNOWN | 199,040.00 |
| 3 | DROUGHT-RELATED IMPACTS | 7,680.00 |
Louisiana
Causes of Impairment
Description of this table| State Cause Name | Size of Assessed Waters with Listed Causes of Impairment | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Rivers, Streams, Creeks (Miles) | Lakes, Ponds, Reservoir (Acres) | Bays, Estuaries (Square Miles) | Coastal Shorelines (Miles) | Oceans, Near Coastal Waters (Square Miles) | Wetlands (Acres) | Great Lakes Shoreline (Miles) | Great Lakes Open Waters (Square Miles) | Inland Lake Shoreline (Miles) | |
| 1,1,1,2-TETRACHLOROETHANE | 12.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| 1,1,2-TRICHLOROETHANE | 7.30 | .00 | 1.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| 1,2-DICHLOROETHANE | 15.30 | .00 | 1.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| AMMONIA (TOTAL) | 220.00 | 89,939.00 | 6.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ATRAZINE | 103.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BROMOFORM | 12.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CADMIUM | 497.00 | 20,184.00 | 1.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CARBOFURAN | 969.00 | 83,840.00 | 187.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CHLORIDE | 616.50 | 132,839.00 | .00 | .00 | .00 | 7,680.00 | .00 | .00 | .00 |
| CHLOROFORM | 7.30 | .00 | 1.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| COLOR | 321.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| COPPER | 324.00 | 20,160.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| DDT | 749.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| DIOXIN (INCLUDING 2,3,7,8-TCDD) | 337.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| FECAL COLIFORM | 3,666.00 | 37,428.00 | 1,522.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| FIPRONIL | 215.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| HEXACHLOROBENZENE | 12.00 | 24.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| HEXACHLOROBUTADIENE | 12.00 | 24.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LEAD | 546.00 | 21,931.00 | 1.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MERCURY | 1,548.00 | 241,230.00 | 1,657.00 | .00 | .00 | 199,040.00 | .00 | .00 | .00 |
| METHOXYCHLOR | 8.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| METHYL PARATHION | 43.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NICKEL | 8.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NITRATE/NITRITE (NITRITE + NITRATE AS N) | 2,396.00 | 126,032.00 | 297.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NITROGEN, NITRITE | 387.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NON-NATIVE AQUATIC PLANTS | 484.00 | 312,059.00 | 91.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| OIL AND GREASE | 144.00 | 40,120.00 | 5.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| OXYGEN, DISSOLVED | 3,918.50 | 164,397.00 | 299.00 | .00 | .00 | 199,040.00 | .00 | .00 | .00 |
| PH | 244.00 | 28,166.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PHENOLS | 8.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PHOSPHORUS (TOTAL) | 2,039.00 | 126,032.00 | 297.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PHOSPHORUS, ELEMENTAL | 38.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| POLYCHLORINATED BIPHENYLS | 41.00 | 2,260.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) (AQUATIC ECOSYSTEMS) | 29.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SEDIMENTATION/SILTATION | 1,696.00 | 164,346.00 | 193.00 | .00 | .00 | 199,040.00 | .00 | .00 | .00 |
| SULFATES | 1,152.00 | 74,899.00 | .00 | .00 | .00 | 7,680.00 | .00 | .00 | .00 |
| TASTE AND ODOR | 69.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TEMPERATURE, WATER | 23.00 | 2,250.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TOTAL DISSOLVED SOLIDS | 1,273.50 | 138,004.00 | .00 | .00 | .00 | 7,680.00 | .00 | .00 | .00 |
| TOTAL SUSPENDED SOLIDS (TSS) | 2,506.00 | 156,343.00 | 193.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TOXAPHENE | 420.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TURBIDITY | 2,314.00 | 186,380.00 | 624.00 | .00 | .00 | 199,040.00 | .00 | .00 | .00 |
| ZINC | 8.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
Louisiana
Probable Sources Contributing to Impairment
Description of this table| State Source Name | Size of Assessed Waters with Probable Sources of Impairment | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Rivers, Streams, Creeks (Miles) | Lakes, Ponds, Reservoir (Acres) | Bays, Estuaries (Square Miles) | Coastal Shorelines (Miles) | Oceans, Near Coastal Waters (Square Miles) | Wetlands (Acres) | Great Lakes Shoreline (Miles) | Great Lakes Open Waters (Square Miles) | Inland Lake Shoreline (Miles) | |
| ATMOSPHERIC DEPOSITON - TOXICS | 1,324.00 | 235,688.00 | 1,657.00 | .00 | .00 | 199,040.00 | .00 | .00 | .00 |
| CHANNELIZATION | 420.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CONTAMINATED SEDIMENTS | .00 | 24.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| DAIRIES (OUTSIDE MILK PARLOR AREAS) | 66.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| DAM OR IMPOUNDMENT | 103.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| DISCHARGES FROM MUNICIPAL SEPARATE STORM SEWER SYSTEMS (MS4) | 148.00 | 1,125.00 | 2.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| DRAINAGE/FILLING/LOSS OF WETLANDS | 194.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| DROUGHT-RELATED IMPACTS | 541.00 | 74,900.00 | .00 | .00 | .00 | 7,680.00 | .00 | .00 | .00 |
| FLOW ALTERATIONS FROM WATER DIVERSIONS | 211.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| FORCED DRAINAGE PUMPING | 71.00 | 2,112.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| IMPACTS FROM HYDROSTRUCTURE FLOW REGULATION/MODIFICATION | 135.00 | 27,981.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| INDUSTRIAL POINT SOURCE DISCHARGE | 484.30 | 2,200.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| INDUSTRIAL/COMMERCIAL SITE STORMWATER DISCHARGE (PERMITTTED) | .00 | 84.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| IRRIGATED CROP PRODUCTION | 2,097.00 | 84,048.00 | 193.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MANAGED PASTURE GRAZING | 214.00 | 26,880.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MARINA/BOATING SANITARY ON-VESSEL DISCHARGES | 59.00 | .00 | 55.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MINE TAILINGS | 30.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MUNICIPAL (URBANIZED HIGH DENSITY AREA) | 156.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MUNICIPAL POINT SOURCE DISCHARGES | 993.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NATURAL CONDITIONS - WATER QUALITY STANDARDS USE ATTAINABILITY ANALYSES NEEDED | 1,711.00 | 144,242.00 | 22.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NATURAL SOURCES | 483.00 | 17,924.00 | 20.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NATURALLY OCCURRING ORGANIC ACIDS | 208.00 | 16,646.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NON-IRRIGATED CROP PRODUCTION | 1,666.00 | 101,460.00 | 193.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ON-SITE TREATMENT SYSTEMS (SEPTIC SYSTEMS AND SIMILAR DECENCENTRALIZED SYSTEMS) | 1,680.00 | 3,280.00 | 7.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PACKAGE PLANT OR OTHER PERMITTED SMALL FLOWS DISCHARGES | 358.00 | 2,112.00 | 7.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PETROLEUM/NATURAL GAS ACTIVITIES | 117.50 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PETROLEUM/NATURAL GAS PRODUCTION ACTIVITIES (PERMITTED) | .00 | 26,880.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| RESIDENTIAL DISTRICTS | 71.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SAND/GRAVEL/ROCK MINING OR QUARRIES | 59.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SANITARY SEWER OVERFLOWS (COLLECTION SYSTEM FAILURES) | 375.00 | 24.00 | 561.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SEDIMENT RESUSPENSION (CLEAN SEDIMENT) | 21.00 | .00 | 20.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SILVICULTURE HARVESTING | 143.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SILVICULTURE PLANTATION MANAGEMENT | 86.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SITE CLEARANCE (LAND DEVELOPMENT OR REDEVELOPMENT) | 100.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SOURCE UNKNOWN | 4,674.50 | 386,109.00 | 2,224.00 | .00 | .00 | 199,040.00 | .00 | .00 | .00 |
| SOURCES OUTSIDE STATE JURISTICTION OR BORDERS | 487.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SURFACE MINING | 17.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TOTAL RETENTION DOMESTIC SEWAGE LAGOONS | 86.00 | .00 | 7.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UNPERMITTED DISCHARGE (DOMESTIC WASTES) | 68.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPSTREAM SOURCE | 430.00 | 24.00 | 44.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| WATERFOWL | 80.00 | 27,840.00 | 20.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| WET WEATHER DISCHARGES (POINT SOURCE AND COMBINATION OF STORMWATER, SSO OR CSO) | 12.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| WILDLIFE OTHER THAN WATERFOWL | 583.00 | .00 | 56.00 | .00 | .00 | .00 | .00 | .00 | .00 |
